There are many ways in which alcohol can affect your judgement, so it is best to get a second opinion on your sobriety before you try to drive home. This BACtrack breathalyzer is easily small enough to stay in your pocket all night, and when it is needed, it hooks up to your smartphone to analyze your breath. The Vio takes five seconds to calculate your blood alcohol level, and it is accurate to 0.00%. The results of the test are displayed via BACtrack’s app, and you can even play a game of “Guess your BAC” to see just how wrong you are.

Slip the compact BACtrack Vio into your pocket or use as a keychain

Bluetooth connectivity to wirelessly sync with the free BACtrack app

ZeroLine® Technology gets an accurate read on when your BAC will return to 0.00%